ASMC_KEY_BCLM
apple_smc_key_getinfo(dev, ASMC_KEY_BCLM, NULL, NULL) == 0) {
if (apple_smc_key_read(dev, ASMC_KEY_BCLM, &bclm, 1) != 0) {
return (apple_smc_key_write(dev, ASMC_KEY_BCLM, &bclm, 1) != 0 ?